Why does mercury in a thermometer rise when the temperature goes up? In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object because mercury expands when the temperature is increased and hence it rises in the capillary tube.
Why are liquids sometimes used in a thermometer group of answer choices?
A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube . ... When it is hot, the liquid inside the thermometer will expand and rise in the tube.
Why does liquid rise in a thermometer group of answer choices?
Item AM042005: When a glass thermometer is placed in hot water, the level of liquid rises because the molecules get farther apart . ... Heat causes the molecules of the liquid to get farther apart. The molecules of the liquid break down into atoms and take up more space.
How does the liquid in a thermometer work?
Liquid-in-glass thermometers are based on the principle of thermal expansion of substances . A liquid in a glass tube (called a capillary) expands when heated and contracts when cooled. A calibrated scale can then be used to read off the respective temperature that led to the corresponding thermal expansion.
What is the liquid in a thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
Which is better mercury or digital thermometer?
1. Digital thermometers provide faster results. Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature.
Why the liquid in the thermometer goes down when cooled?
When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. ... When cooled, the molecules of the liquid in the thermometer move slower, causing them to get a little closer together . This results in movement down the thermometer.
What two liquids are used in thermometers?
The two common liquids used in liquid-in-glass thermometers are alcohol (ethanol) and mercury , which have melting points and boiling points of -114 C, 79 C and -39 C, 357 C, respectively.
What liquid is used in thermometer and why?
Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
Why do thermometers use alcohol?
Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury . Pure ethanol freezes at -115 degrees C, while mercury freezes at -38 degrees C. Thermometers rely upon thermal expansion of the liquid in a bulb at the base of a thin glass tube.
What liquid is used in Galileo thermometer?
The liquid in AcuRite Galileo Thermometers is 100% paraffin . The colored bulbs are filled with paraffin and 3.4% dye. The liquid is non-toxic.
Which liquid can be used in a glass thermometer?
Mercury , the liquid in the thermometer, is enclosed in a sealed glass bulb that expands into a fine bore present in the stem of the thermometer. A scale is etched along the stem of the thermometer that is used for reading the temperature.
What is liquid rising in a thermometer as temperature increases?
Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers. An increase in temperature results in the expansion of the liquid which means it rises up the glass.
What is inside thermometers red liquid?
Mercury is a silver-white to gray substance. If your thermometer is filled with a red liquid, your thermometer contains red dyed alcohol or mineral spirits and not mercury. These are safer alternatives to mercury fever thermometers.
What do F and C mean?
C & F in Accounting
(si ənd ɛf) or cost & freight. abbreviation. (Accounting: Commerce) C & F refers to a shipping contract which includes the cost of the goods and the freight, but not insurance. With a C & F contract, the price of the goods includes the cost of the goods and the freight to the named destination.
How accurate are alcohol thermometers?
Alcohol thermometers are also inexpensive and durable. They are typically not as accurate as mercury thermometers because of the alcohol's susceptibility to evaporation, polymerization potential and capillary separation. Their primary advantage is safety to humans and the environment.
